ron.kagan

May 5, 2011

Hi. I am looking for an example of using a legend item template with checkboxes to show/hide the different series.

could not find one

any help will be appreciated

September 2, 2010

Hi there.

I'm still having many problems with this approach.

My span can vary berween day, week , month etc...

When the span is day it look great, but on other variants, setting the step to be the XWidth of the bar to be the span (week = 7 days, month = 30 days) it looks wrong, the bars and the step don't match, the labels appear not on the ticks as it should and it just not working.

I am still not sure why doing what i did with the string labels (persuming i make sure all the dates are consecutive and if there is a gap i make sure to fill it with a zero value point)

September 1, 2010

This method didn't work for me.

I have tried a different approach - I have added a label property for my clr object, and set the label binding path to this property. however now i don't see any labels at all as before when i set the labels binding path to the 'X' property, I saw the labels but they were not formatted and only shown the date part of the the date time.

What am i missing ? I was sure this would work as I simply assign a different property of string type to the axis x labels.

August 31, 2010

Hi.

I am creating a bar chart using this code :

SeriesAttributes sa = new SeriesAttributes();

sa.BindingPath = "Y";

_myChart.AxisX.Labels.BindingPath = "X";

The item source is a clr object collection where the clr object has two properties - x (datetime) and y (double).

The problem i am having that the labels on the x axis are always appear as dd MMM yy

even when i change the _myChart.AxisX.Labels.CustomFormat to something different - this works fine when doing the same for a line chart, but not on a bar chart.

July 20, 2010

Solved. this settings is what was needed ,and it will help us later when we need to export chart w/o it ever being loaded so I will use the RendedBeforeLoad settings.

Thank you.

July 18, 2010

for any wpf control, the code for export a visual to image works, however for your chart element , it does not.

doing the solution with the thread first gave me the cross thread violation , and using the dispatcher invoke, the result was that the image was not even black - it was completely empty.

Can you think of another path for solving this critical issue ?

July 14, 2010

Hello there.

In my application I have multiple chart elements in different tabs. one scenario demands me to export all currently opened charts to images.

however doing so results in black empty images for all charts that are not currently visible to the eye (visibility is visible but they are in a tab that is not the current active tab).

Can you think of a reason a chart will export to a blank image ? Do you need more information on this issue ?

July 5, 2010

Hello there. another issue i'm having with mouse interaction , is working with two chart elements on the same container. I need two chart elements (not two panes but two instances of the chart object) that will both be interactive. when i set mouse selection on the first chart and then on the second , IT will not be available on the second chart.

I need an option to zoom on the 1st chart, and while viewing it zoomed , start a mouse selection on the other one.

Is this possible ?

July 5, 2010

One thing I have noticed, is that if a mouse selection has started, any mouse interaction like tool-tips, moving the scroll-bars when zoomed is disabled.

I find this behavior limiting since I'm trying to achieve continous zooming (select a zoom area, and on the scroll view changed start another zoom selection so i won't need to click on a button to start each zoom selection). when this is the case, I cannot interact with the scroll-bars.

July 5, 2010

You can discard the last question - solved this it was in my code after all.

July 4, 2010

Hi there.

I have noticed that if i select an empty area (no markers), the continuous selection will not work. something is changing the zoom mode to off or something. I could not trace it as it happens in your dll code. Could you check this also and provide a hot-fix if possible ?

July 4, 2010

My bad. i didn't remove the old refernce so the files in the bin were the old ones.

The hotfix did the job. good work !

July 2, 2010

another issue i'm having is being able to cancel the mouse selection operation once started.

In my application i need the option to click on a button and the mouse selection will be canceled.

July 1, 2010

That doesn't give me the ability to change some of the points - i.e change all points marker above a certain spec value or change marker of every 5th point ... is this even possible ?

July 1, 2010

I installed the hotfix but this didnt solve my problem - the second time I call the start mouse selection (on the databound event) it doesn't work.

July 1, 2010

Hello.

I'm trying to change some point appearance like marker shape / size etc...

as far as i understand, i can access the chart.Data to get the all the point attributes using the series and point index.

when i change any of the point attribute like stroke or fill, the point will not appear on the chart.

July 1, 2010

Hello. my charts usually contains large amount of points on a line type chart (hundred of thousands).

when this amount is shown without markers, chart is drawn pretty quickly considered the large amount of data. when the markers are visible this becomes very slow to the point of unusable.

is there any way to be able to work with markers with this amount of data ?

This i s very critical to our project as this is a must have feature being able to handle large data.

July 1, 2010

Many thanks Juan. the template idea was a perfect fit for me, i just didn't knew the DataItem.ColumnName syntax. I am really impressed by the support I get here. keep up the good work.

June 30, 2010

another issue related to mouse selection.

I am working with actipro docking , and hosting the chartFX inside mdi (tabs)

when i first open a new tab item with a chart, the mouse selection is not working at all, and only after i open another tab and then go back to the first tab, i can select point with the mouse.

Can you think of anything i can try to do to fix this issue ?

June 30, 2010

Hello. I need a way to fully be able to customize a point tool-tip. the best way i can think is to have a column on the data table i am using as a items source to contain the tool-tip text, and assign this column to the series attribute in some way so this text will appear as the point tool-tip.

I know you can format the tool-tip using the %p %v etc... but i need the text to be created dynamically. another way is maybe using a template with a converter, and passing the entire chart element as the parameter to the converter. this way i can access some of the chart attributes when converting the value to the desired tool-tip.

best scenario (other than pre-constructing the tooltip and binding it from a dedicated column) is to have a converter where i can access the point attributes including the x and y values, and the chart object as the parameter.

June 30, 2010

thanx. I already figured the XValues = true and XWidth but what solved this was assigning the XValues = true before giving the series attributes the items source.

I have another open question regarding mouse selection and zooming that was not answered for couple of days so if someone can have a look that will be nice.

June 29, 2010

Let me add something - when i select from the gallery area/scatter, this works fine - the problem lies in the Bar type chart. i want to show bars with fixed width (the same as the step) so the outcome will look like continous steps :

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June 29, 2010

Thanx. I now understand that crosstab was indeed overkill.

the problem is there are still issues regarding the axis x as before:

I use (as suggested) this code :

SeriesAttributes se = new SeriesAttributes();

se.ItemsSource = histogramTable.DefaultView;

se.BindingPath = "YValue";

se.BindingPathX = "XValue";

chart1.Series.Clear();

chart1.Series.Add(se);

setting the min/max of the axisx still throw the same exception as before.

June 29, 2010

Sure thing.

My data table consists of two columns - XValue (double) and YValue (int)

here is the code I use

chart1.Gallery = Gallery.Bar;

chart1.ItemsSource = histogramTable.DefaultView;

CrosstabTransform ctt = new CrosstabTransform();

ctt.RowPath = "XValue";

ctt.ValuePath = "YValue";

ctt.XValuePath = "XValue";

chart1.DataTransforms.Clear();

chart1.DataTransforms.Add(ctt);

in the databound event , if this two lines exist, I get the mentioned exception :

chart.AxisX.Min = new DataUnit(_minXValue);

chart.AxisX.Max = new DataUnit(_maxXValue);

If i skip these two lines , the chart appears but with no visible data as the axis is not correct.

if i "refresh" - where i reassign the itemsource to the chart and the lines that sets the axixX min/max are called again, the chart appears as it should

June 29, 2010

Hello. I'm getting very frustrated with this control. I am working with a datatable that is crosstab transformed to a bar chart.

in the databound event i am changing the x axis min and max, which caused the index was outside teh bounds of the array and this stacktrace :

at ChartFX.WPF.SeriesDataArray.c(Int32 A_0)

at ChartFX.WPF.DataArray.get_Item(Int32 series, Int32 point)

at ChartFX.WPF.DataArray.ChartFX.WPF.Internal.IDataSimpleArray.get_Item(Int32 point)

at ChartFX.WPF.GenericStepper.a(Double A_0, Double A_1)

at ChartFX.WPF.NumericStepper.a(Double A_0, Double A_1, Double A_2, Double A_3, Boolean& A_4)

at ChartFX.WPF.Axis.b(AxisPaint A_0, SectionAttributes& A_1, AxisPaintInfo& A_2, Double A_3, Double A_4, AxisPaintFlags A_5, Double A_6, Double A_7)

at ChartFX.WPF.Axis.a(AxisPaint A_0, SectionAttributes& A_1, AxisPaintInfo& A_2, Double A_3, Double A_4, AxisPaintFlags A_5, Double A_6, Double A_7)

at ChartFX.WPF.Axis.a(Size A_0, AxisPaintFlags A_1, FrameworkElement A_2, IPlotArea A_3, IAxisPainter A_4)

at ChartFX.WPF.Axis.AxisPainter.OnRender(DrawingContext drawingContext)